On Sat, Apr 5, 2014 at 5:21 PM, Robert Vollmert
- clobbering the environment by prepending to an association list makes me wonder if that's really what happens when the variable is already defined
Yes, that does raise flags. The haskell here: installEnv <- getEnvironment >>= return . (:) ("GOBIN", gOBIN) which I'd probably write as installEnv <- (("GOBIN", gOBIN) :) <$> getEnvironment doesn't match the python here: GOBIN = tempfile.gettempdir() os.environ['GOBIN'] = GOBIN in the sense that the case for a predefined GOBIN in the environment will lead to different results. At least I'll be surprised if otherwise. To Matt: have you tested your haskell version? You might want to take a look at System.Posix.Env.putenv. -- Kim-Ee